From adad580e85df1e7bbdffbf50d22aa6d40f67eee1 Mon Sep 17 00:00:00 2001
From: Ryan P Kilby <kilbyr@gmail.com>
Date: Thu, 13 Sep 2018 08:50:27 -0700
Subject: [PATCH] Drop 'BooleanField.allow_null' check

---
 rest_framework/fields.py | 6 ------
 tests/test_fields.py     | 2 --
 2 files changed, 8 deletions(-)

diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 8b45b9aa4..44956aa04 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -10,7 +10,6 @@ import re
 import uuid
 from collections import OrderedDict
 
-import django
 from django.conf import settings
 from django.core.exceptions import ObjectDoesNotExist
 from django.core.exceptions import ValidationError as DjangoValidationError
@@ -677,11 +676,6 @@ class BooleanField(Field):
     }
     NULL_VALUES = {'n', 'N', 'null', 'Null', 'NULL', '', None}
 
-    def __init__(self, **kwargs):
-        if django.VERSION < (2, 1):
-            assert 'allow_null' not in kwargs, '`allow_null` is not a valid option. Use `NullBooleanField` instead.'
-        super(BooleanField, self).__init__(**kwargs)
-
     def to_internal_value(self, data):
         try:
             if data in self.TRUE_VALUES:
diff --git a/tests/test_fields.py b/tests/test_fields.py
index 8458db604..1b8f596e2 100644
--- a/tests/test_fields.py
+++ b/tests/test_fields.py
@@ -5,7 +5,6 @@ import unittest
 import uuid
 from decimal import ROUND_DOWN, ROUND_UP, Decimal
 
-import django
 import pytest
 import pytz
 from django.core.exceptions import ValidationError as DjangoValidationError
@@ -683,7 +682,6 @@ class TestNullBooleanField(TestBooleanField):
     field = serializers.NullBooleanField()
 
 
-@pytest.mark.skipif(django.VERSION < (2, 1), reason='Django version < 2.1')
 class TestNullableBooleanField(TestNullBooleanField):
     """
     Valid and invalid values for `BooleanField` when `allow_null=True`.